Sectional production method of epichlorohydrin

A technology for epichlorohydrin and a production method, applied in chemical recovery, organic chemistry and other directions, can solve the problems of low utilization rate of raw materials, improved product yield, low reaction efficiency, etc. The effect of reducing the amount and improving the production efficiency

Inactive Publication Date: 2020-01-03
河北美邦工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of segmented epichlorohydrin to solve the problems of low raw material utilization rate, product yield to be improved, low reaction efficiency, high energy consumption and environmental pollution in the existing process

Method used

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  • Sectional production method of epichlorohydrin

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Embodiment 1

[0028] The solvent-free reaction system of this embodiment adopts a two-stage reaction method, including a first-stage reactor and a second-stage reactor; the solvent-containing reaction system adopts a one-stage reaction method. See figure 1 Given a schematic diagram of the process flow of the present invention, the process of the present invention includes the following steps:

[0029] Add chloropropene, hydrogen peroxide, titanium silicon catalyst, and pH adjuster to the first stage reactor of the solvent-free reaction system in the following proportions. Among them, hydrogen peroxide is an aqueous hydrogen peroxide solution with a mass concentration of 50%. The molar ratio of chloropropene to hydrogen peroxide is 3, the mass of the titanium-silicon catalyst accounts for 5% of the total mass of the reaction raw materials, ammonia water is used as the solution pH regulator to adjust the pH of the solution to 3, and the reaction temperature is controlled to 40°C and the pressure...

Embodiment 2

[0036] The solvent-free reaction system of this embodiment adopts a two-stage reaction method, including a first-stage reactor and a second-stage reactor; the solvent-containing reaction system adopts a one-stage reaction method. See figure 1 Given a schematic diagram of the process flow of the present invention, the process of the present invention includes the following steps:

[0037] Add chloropropylene, hydrogen peroxide, applied titanium silicon catalyst, fresh titanium silicon catalyst, and pH adjuster into the first stage reactor of the solvent-free reaction system in the following proportions. The concentration of hydrogen peroxide in the hydrogen peroxide aqueous solution is 50% , The molar ratio of chloropropylene to hydrogen peroxide is 3, the mass of the titanium-silicon catalyst accounts for 5% of the total mass of the reaction raw materials, and the mass ratio of the applied titanium-silicon catalyst to the fresh titanium-silicon catalyst is 7:3, and ammonia is use...

Embodiment 3

[0044] The solvent-free reaction system of this embodiment adopts a one-stage reaction method, and the solvent-containing reaction system also adopts a one-stage reaction method. See figure 1 Given the process flow diagram of the present invention, the process includes the following steps:

[0045] Add chloropropylene, hydrogen peroxide, applied titanium silicon catalyst, fresh titanium silicon catalyst, and pH adjuster into a reactor of the solvent-free reaction system according to the following proportions. The concentration of hydrogen peroxide in the aqueous hydrogen peroxide solution is 50%. The molar ratio of propylene to hydrogen peroxide is 3, the mass of the titanium-silicon catalyst accounts for 5% of the total mass of the reaction raw materials, and the mass ratio of the titanium-silicon catalyst to the fresh titanium-silicon catalyst is 7:3, and ammonia is used as the solution pH regulator Adjust the pH of the solution to 3, control the reaction temperature to 40°C, ...

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Abstract

The invention provides a sectional production method of epichlorohydrin. The sectional production method of the epichlorohydrin comprises the following steps: adding chloropropene, a hydrogen peroxideaqueous solution, a titanium-silicon catalyst and a pH regulator into a solvent-free reaction system, and carrying out an epoxidation reaction of the chloropropene; conducting oil-water separation onreaction liquid of the solvent-free reaction system, and conducting product refining on an oil phase to obtain the epichlorohydrin; with a water phase containing the catalyst entering a reaction system with a solvent, carrying out the epoxidation reaction continuously in the presence of the solvent; and separating reaction liquid of the reaction system with the solvent, and conducting product refining on clear liquid of the reaction to obtain the epichlorohydrin. The sectional production method of the epichlorohydrin is simple in technology and mild in condition, the production efficiency isimproved, a conversion rate of hydrogen peroxide is effectively improved, the use amount of the solvent is little, the yield of the target product is high, online repeated use of the catalyst can be achieved, the technology is environmentally friendly and safe, and the production cost and energy consumption are greatly reduced, so that the sectional production method of the epichlorohydrin has wide industrial application prospects and good social and economic benefits.

Description

Technical field [0001] The invention relates to a production method of organic matter, in particular to a production method of segmented epichlorohydrin. Background technique [0002] Epichlorohydrin (ECH) is an important organic chemical raw material and fine chemical product with a wide range of uses. Epichlorohydrin is mainly used to prepare epoxy and phenoxy resins. The epoxy resin prepared with epichlorohydrin as the main raw material has strong adhesion, resistance to chemical media, low shrinkage and good chemical stability. , High impact strength and excellent dielectric properties. It has a wide range of applications in coatings, adhesives, reinforcing materials, casting materials and electronic laminates. At the same time, epichlorohydrin is also a stabilizer and chemical intermediate of oxygen-containing substances. It is used to synthesize glycerin, nitroglycerin explosives, FRP, electrical insulation, surfactants, medicines, pesticides, coatings, rubbers, ion exchan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12C07D303/08
CPCC07D301/12C07D303/08Y02P20/584
Inventor 马东兴吴迪张萌刘东
Owner 河北美邦工程科技股份有限公司
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